What is the difference between 11i and R12 in Oracle Apps

11i
1) Consist of 3C
2) No concept of MOAC.
3) Major table changes like po_vendors.
4) Banks are created in Account Payables.
5) Ap_Invoices_lines_all table in finance is not there.

R12
1) Consist of 4C
2) Introduction of MOAC( Multi org access control)
3) Major table changes (Ap_suppliers)
4) Banks are created in Cash Management.
5) Subledger Accounting is not there.
5) Ap_invoices_lines_all is there.
6) Subledger Accounting is there.

How to know what are the Seeded table,Transactional Tables, Static Data Tables in Oracle Applications

You can tell based on the TABLESPACE the table belongs to - this is the new Oracle Applications Tablespace Model (OATM)

Run the following code to see:

SELECT tablespace_name, table_name
FROM all_tables
WHERE tablespace_name LIKE '%SEED%' -- seeded data
AND table_name LIKE 'FND%'

SELECT tablespace_name, table_name
FROM all_tables
WHERE tablespace_name LIKE '%TX%' -- transaction data
AND table_name LIKE 'FND%'

SELECT tablespace_name, table_name
FROM all_tables
WHERE tablespace_name LIKE '%ARCHIVE%' -- static data
AND table_name LIKE 'FND%'